JPH0360602B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bar material steady rest device, and more particularly to a device for preventing rotational swing of bar material supplied from a bar material feeder to a bar material processing machine.

Conventionally, there have been two types of bar steady rest devices: a belt-type bar steady rest device suitable for steadying relatively small-diameter bars, and a roller-type bar steady rest device suitable for steadying relatively large-diameter bars. The bar steady rest device of the present invention belongs to the latter category.

When bar material is processed by a bar material processing machine,
Since the bar material is rotated at a fairly high speed,
Particularly in the case of heavy, large-diameter bar materials, once rotational runout occurs, the processing accuracy of the product will deteriorate, and the bar material processing machine or bar material feeder may be damaged, or a dangerous situation may occur for the worker. It also becomes. Therefore, the bar must be supported effectively to minimize vibration.

In order to effectively prevent rotational vibration of the bar material, it is not enough to simply support the bar material firmly; it is also necessary to have a function to absorb as effectively as possible the vibrations of the bar material that occur during rotation. It is necessary to

As a conventionally known bar material feeder equipped with a roller-type bar material steadying device, there is one developed by Hermann Traub of West Germany, for example.

However, even though this roller type bar steady rest device has the function of firmly supporting the bar, it is insufficient in its ability to effectively absorb the vibrations of the bar that occur during rotation. It is not necessarily satisfactory as a steady rest device. In this conventional steady rest device, the outer periphery of the support roller for supporting the bar material is made of an elastic material, so this elastic member has the function of absorbing vibrations of the bar material. There is no other mechanism for this, and vibration absorption is carried out exclusively by the elastic member of this support roller. For this reason, the vibration absorption effect is also insufficient, and for example, when the bar material is bent, there is a drawback that if the bar material is strongly hit against one bar material supporting roller, the other bar material supporting rollers will also be opened.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a bar steady resting device that can further improve the vibration absorption effect of the conventional roller type bar steady resting device and exhibit sufficient performance as a bar steady resting device.

The purpose of this is to not only provide a vibration absorption effect (first vibration absorption effect) by making the outer periphery of the bar material support roller with an elastic member, but also to support the arm for supporting the bar material support roller via the elastic member. This is achieved by providing a mechanism in which each bar material support roller can also obtain an independent vibration absorption effect (second vibration absorption effect).

EMBODIMENT OF THE INVENTION Hereinafter, the bar material steady rest device of this invention is demonstrated based on an accompanying drawing.

As shown in FIGS. 1 and 2, the bar material steady rest device 10 of the present invention has a base plate 12, and approximately the center of the base plate 12 has a diameter that allows a bar material (not shown) to pass through. A hole 14 is bored. Hole 14
A plurality of shafts 16 are supported around the hole 14 so as to be rotatable with respect to the substrate 12, with the shaft 16 at the center. In the illustrated embodiment, a bar steady rest device 10 is shown in which the bar is supported by four bar supporting rollers 18, so that the shaft 16
However, the bar material can also be supported by three or more arbitrary support rollers 18, and therefore the number of shafts 16 can also be changed to an arbitrary number of three or more depending on the number of support rollers 18. can do. The bar material support roller 18 has an outer periphery 20 made of an elastic material such as rubber or plastic, similar to the support roller used in a conventional bar material steady rest device, to prevent vibrations occurring in the bar material. This elastic member can absorb the vibration (first vibration absorption effect).

Next, the structure of the vibration damping component for producing the second vibration absorbing effect, which is the most important feature of the bar material steady rest device 10 of the present invention, will be explained based on FIG. 3.

This anti-vibration buffer component 22 is manufactured by ROSTA.
It is called a "rubber spring" which is commercially available under the trademark of
It is shown in Figure c. The basic structure of the anti-vibration cushioning component 22 includes a cylindrical member (referred to as the "second member") 26 having a rectangular through hole 24, and a core member (referred to as the "second member") 26 with a rectangular cross section that is inserted into the through hole 24 ( 28 (referred to as a "first member"), and an elastic member 30 such as rubber that is press-fitted between each corner of the through hole 24 and each flat surface of the core member 28. Therefore, when torque acts between the first member 28 and the second member 26,
Both members 26 and 28 can be rotated relative to each other within a certain range of angles via an elastic member 30. As will be described later, in the present invention, the shaft 16 is fixed to the first member 28, and the arm 40 for supporting the bar material support roller 18 is fixed to the second member 26. The vibration is not only absorbed by the elastic member 20 of the bar support roller 18 (first vibration absorption effect), but also absorbed by the elastic member 30 of the vibration-proofing and buffering component 22 (second vibration absorption effect). (vibration absorption effect). Furthermore, the third
The number 32 in the figure is a hole through which a screw or pin (screw 42 in the present invention) for fixing the member (shaft 16 in the present invention) to be fixed to the first member 28 is passed, and the number 34 is a hole through which a screw or pin (screw 42 in the present invention) is passed. A member (arm 40 in the present invention) to be fixed to the second member via
This is a groove for interlocking with the

The anti-vibration buffer component 22 is attached to the tip of each shaft 16, as shown in FIG. That is, by inserting the screw 42 into the hole 32 formed in the first member 28 of the vibration-proof shock absorbing component 22 and screwing the screw 42 into the screw hole provided in the shaft 16, the first member 28 and the shaft are connected. 16 is fixed. The second member 26 , which is coaxially arranged with respect to the first member 28 via the elastic member 30 , is connected to the bar material support roller 1 by a shaft 19 .
8 is fixed to an arm 40 that rotatably supports it. This fixing is done by pressing the key 4 as shown in Figure 1.
4 is inserted between the groove 34 formed on the outer periphery of the second member 26 and the arm 40, and then the screw 46 that fixes the arm 40 so that it does not come off the second member 26 is tightened.

The four arms 40 are attached to move in different planes, as shown in FIG. 2, so that the bar material support rollers 18 rotatably attached to their ends do not interfere with each other. . That is, a pair of arms 40 (indicated by A and A' in FIG. 1) located opposite to each other with respect to the center "O" of the hole 14 in the substrate 12 are located close to the substrate 12 as shown in FIG. The arms 40 of the other pair (the pair shown as B and B' in FIG. 1) are in a plane away from the substrate 12.

Next, a mechanism for swinging each arm 40 around its axis 16 will be explained. FIG. 1 shows each arm 40 in the open position, that is, in a position where the support roller 18 does not come into contact with the outer periphery of the bar material to be processed.
In order to support the bar material by 8, each arm 40 is swung around each axis 16 so as to move toward the center "O" of the hole 14 until the support roller 18 comes into contact with the outer periphery of the bar material. There must be.

For this reason, the bell crank 50a is fixed to one of the shafts 16 (in this embodiment, the shaft supporting the arm indicated by B in FIG. 1). The bell crank 50a is fixed approximately at the middle of the shaft 16, as shown in FIG. The bell crank 50a has two arms of unequal length, and the long arm has a bracket 5 fixed to the base plate 12.
The piston rod 56 of a trunnion-type hydraulic or pneumatic cylinder 54 is pivotally connected to the cylinder 2. One end of a connecting rod 58 is pivotally connected to the short arm of the bell crank 50a, and the other end of the connecting rod 58 is attached to the short arm of the bell crank 50b, which is fixed to the shaft 16 that supports the arm shown at A in FIG. It is pivoted to one side of the long arm. One end of a connecting rod 58 is connected to the other arm of this bell crank 50b, and the other end of the connecting rod 58 is attached to a similar bell crank fixed to the shaft 16 supporting the arm shown at B' in FIG. It is pivotally attached to one arm of 50b. Similarly, a connecting rod 58 is pivotally connected to the other arm of the bell crank 50b, and the other end of the connecting rod 58 is connected to a lever fixed to the shaft 16 that supports the arm shown at A' in FIG. It is pivoted to 50c.

With the above structure, by extending the piston rod 56 of the cylinder 54 from the state shown in FIG. 1, each shaft 16 and the arm 40 fixed to each shaft simultaneously swing clockwise.
Therefore, the bar material support rollers 18 supported by each arm 40 simultaneously move inward toward the center "O" of the hole 14 provided in the substrate 12. Furthermore, all axis 1
Instead of interlocking 6, the individual axes can be configured to be driven by separate vibration sources, or a specific pair of axes can be interlocked. Furthermore, an electric motor can be used instead of the cylinder as the drive source.

The bar material support roller 18 moves the hole until the elastic member 20 provided on its outer periphery contacts the outer periphery of the bar material to be processed (actually, the elastic member 20 contacts the outer periphery of the bar material to the extent that it is slightly depressed). 14 inwardly toward the center. Therefore, when changing the specifications (diameter) of the bar material to be processed, it is necessary to adjust the stopping position of the bar material support roller 18. This adjustment device is designated by the numeral 60 in FIG. The adjusting device 60 includes a screw 64 supported by a bracket 62 fixed to the base plate 12, and a locking piece 66 fixed to the bell crank 50b. The locking piece 66 is adapted to engage with a stopper 68 attached to the tip of the screw 64. By operating the screw 64 according to the diameter of the bar material to be machined and positioning the stopper 68 at a predetermined position, when the bell crank 50b rotates clockwise, the locking piece 66 will move as shown in FIG. It comes into contact with the stopper 68 at the position shown by the dashed line. Therefore, the swinging motion of each arm 40 attached to each shaft 16 also stops at this position, and the bar material is supported by each bar material support roller 18 at an optimal position according to its diameter. Once the desired position of the stopper has been determined, it is secured with a nut 69 to prevent the screw 64 from moving due to vibration.

Incidentally, a screw 59 is provided in the middle of each connecting rod 58, and by operating the screw 59, the connecting rod 58 can be extended and contracted, and each bar material support roller 1 can be expanded and contracted.
8 can be adjusted so that it contacts the bar material uniformly.

Next, the position where the bar steady rest device 10 of the present invention should be installed will be explained based on FIG. 4.
As shown in FIG. 4, the bar material feeder 1 and the bar material processing machine 2 are used side by side in the axial direction of the bar material to be processed. Bar material steady rest device 1 of the present invention
0 is attached to the front end of the bar material feeder 1 as shown in FIG. As shown in FIG. 4c, a stand 3 or the like is disposed between the bar material supplying machine 1 and the bar material processing machine 2, and the bar material processing machine 2 can be attached by either method. However, the steady rest device used for relatively large-diameter bar materials, such as the roller type bar material steady rest device of the present invention, is not suitable for the headstock of the bar material processing machine 2, as shown in FIG. 4b. It is most effective to install it close to the rear of 2a.

Since the bar material steady rest device of the present invention is configured as described above, the vibration of the bar material is absorbed by the elastic body 20 provided on the outer periphery of each bar material support roller 18 (first vibration absorption effect). In addition, a vibration-proof and shock-absorbing component 22 that connects each arm 40 and each shaft 16 is provided.
Since vibrations are also absorbed by the elastic member 30 (second vibration absorption effect), it is possible to obtain an extremely superior steady rest effect compared to conventional steady rest devices. Note that if an air cylinder is used as the cylinder 54, even if a vibration occurs that cannot be absorbed even by the first and second vibration absorption effects, the air cylinder will eventually absorb the vibration ( 3 vibration absorption effect).

[Brief explanation of drawings]

FIG. 1 is a front view of a bar steady rest device according to the present invention. FIG. 2 is a side view taken along the - line in FIG. 1. FIG. 3 is a drawing showing a vibration-proofing and buffering component used to connect an arm and a shaft of the bar steady rest device of the present invention. Figure 4 shows
FIG. 2 is a schematic side view showing the arrangement of a bar material feeder and a bar material processing machine, and is a drawing for explaining the location where the bar material steadying device of the present invention is to be attached. 10... Substrate, 16... Shaft, 18... Bar material support roller, 20... Elastic body of bar material support roller,
22... Anti-vibration shock absorbing component, 30... Elastic body of the anti-vibration shock absorbing component, 40... Arm.

Claims (1)

[Claims] 1 A substrate 12 in which a hole 14 through which a bar material can pass is formed, a plurality of shafts 16 rotatably supported on the substrate 12 around the hole 14, and the shafts 1
6, a second member 26 disposed coaxially with respect to the first member 28 via an elastic member 30, and an arm 40 fixed to the second member 26. , a bar material support roller 18 that is rotatably supported by the arm 40 and whose outer periphery is made of the elastic member 20, and a bar material support position where the bar material support roller 18 abuts the outer periphery of the bar material. and a drive device 5 that rotates each of the plurality of shafts 16 to swing the arm 40 between the position of the cover material and the cover material open position that does not contact the outer periphery of the bar material.
A bar material steady rest device comprising: 4.